granicus.if.org Git - strace/blob - fetch_struct_statfs.c

   1 /*
   2  * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "defs.h"
  29
  30 #include DEF_MPERS_TYPE(struct_statfs)
  31 #include DEF_MPERS_TYPE(struct_statfs64)
  32
  33 #include <linux/types.h>
  34 #include <asm/statfs.h>
  35 typedef struct statfs struct_statfs;
  36 typedef struct statfs64 struct_statfs64;
  37
  38 #include MPERS_DEFS
  39
  40 #include "statfs.h"
  41
  42 MPERS_PRINTER_DECL(bool, fetch_struct_statfs,
  43                    struct tcb *const tcp, const kernel_ureg_t addr,
  44                    struct strace_statfs *const p)
  45 {
  46         struct_statfs b;
  47
  48         if (umove_or_printaddr(tcp, addr, &b))
  49                 return false;
  50
  51         p->f_type = zero_extend_signed_to_ull(b.f_type);
  52         p->f_bsize = zero_extend_signed_to_ull(b.f_bsize);
  53         p->f_blocks = zero_extend_signed_to_ull(b.f_blocks);
  54         p->f_bfree = zero_extend_signed_to_ull(b.f_bfree);
  55         p->f_bavail = zero_extend_signed_to_ull(b.f_bavail);
  56         p->f_files = zero_extend_signed_to_ull(b.f_files);
  57         p->f_ffree = zero_extend_signed_to_ull(b.f_ffree);
  58 #if defined HAVE_STRUCT_STATFS_F_FSID_VAL
  59         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.val[0]);
  60         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.val[1]);
  61 #elif defined HAVE_STRUCT_STATFS_F_FSID___VAL
  62         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.__val[0]);
  63         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.__val[1]);
  64 #endif
  65         p->f_namelen = zero_extend_signed_to_ull(b.f_namelen);
  66 #ifdef HAVE_STRUCT_STATFS_F_FRSIZE
  67         p->f_frsize = zero_extend_signed_to_ull(b.f_frsize);
  68 #endif
  69 #ifdef HAVE_STRUCT_STATFS_F_FLAGS
  70         p->f_flags = zero_extend_signed_to_ull(b.f_flags);
  71 #endif
  72
  73         return true;
  74 }
  75
  76 #if defined ARM || (defined AARCH64 && defined IN_MPERS)
  77 /* See arch/arm/kernel/sys_oabi-compat.c for details. */
  78 # define COMPAT_STATFS64_PADDED_SIZE (sizeof(struct_statfs64) + 4)
  79 #endif
  80
  81 MPERS_PRINTER_DECL(bool, fetch_struct_statfs64,
  82                    struct tcb *const tcp, const kernel_ureg_t addr,
  83                    const kernel_ureg_t size, struct strace_statfs *const p)
  84 {
  85         struct_statfs64 b;
  86
  87         if (sizeof(b) != size
  88 #ifdef COMPAT_STATFS64_PADDED_SIZE
  89             && sizeof(b) != COMPAT_STATFS64_PADDED_SIZE
  90 #endif
  91            ) {
  92                 printaddr(addr);
  93                 return false;
  94         }
  95
  96         if (umove_or_printaddr(tcp, addr, &b))
  97                 return false;
  98
  99         p->f_type = zero_extend_signed_to_ull(b.f_type);
 100         p->f_bsize = zero_extend_signed_to_ull(b.f_bsize);
 101         p->f_blocks = zero_extend_signed_to_ull(b.f_blocks);
 102         p->f_bfree = zero_extend_signed_to_ull(b.f_bfree);
 103         p->f_bavail = zero_extend_signed_to_ull(b.f_bavail);
 104         p->f_files = zero_extend_signed_to_ull(b.f_files);
 105         p->f_ffree = zero_extend_signed_to_ull(b.f_ffree);
 106 #if defined HAVE_STRUCT_STATFS64_F_FSID_VAL
 107         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.val[0]);
 108         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.val[1]);
 109 #elif defined HAVE_STRUCT_STATFS64_F_FSID___VAL
 110         p->f_fsid[0] = zero_extend_signed_to_ull(b.f_fsid.__val[0]);
 111         p->f_fsid[1] = zero_extend_signed_to_ull(b.f_fsid.__val[1]);
 112 #endif
 113         p->f_namelen = zero_extend_signed_to_ull(b.f_namelen);
 114 #ifdef HAVE_STRUCT_STATFS64_F_FRSIZE
 115         p->f_frsize = zero_extend_signed_to_ull(b.f_frsize);
 116 #endif
 117 #ifdef HAVE_STRUCT_STATFS64_F_FLAGS
 118         p->f_flags = zero_extend_signed_to_ull(b.f_flags);
 119 #endif
 120
 121         return true;
 122 }